Electrical switch.



B. D. HORTON.

ELECTRICAL SWITCH.

APPLICATION FILED NOV. 25 1913.

1,127A%2, Patented Feb.9,1915.

FEGQ.

FEQ. 2.

- Q Q ww/g zw BRYSON ID. HORTON, OF DETROIT, MICHIGAN.

ELECTRICAL SWITCH.

Application filed November 25, 1913.

consisting of receptacle and cover portions.-

ln this specific type of switch, the stationary and movable contacts aremounted upon a base of insulating material attached to the bottom of thereceptacle. The movable contacts are pivotally mounted to the base andare ope ated by a crank or operating member provided with a bearing inthe side of the case and extending outside to provide for exteriormanipulation.

My present improvement consists in providing means for positivelyholding the switch contacts in their on position when they aremanipulatedto make electrical connection and to accelerate the breakingof the connection between the contacts upon the manipulation of theoperating crank or handle eliect this result,

in the accompanying sheet of drawings: fl illustrates top plan view of aece tacle being open and the contacts 1 in their on position, is a nelevation showing the parts in n, and Fig. 8 is a cross sectional n online a-a of 1 with the wn in their ofi position indicates a metallicreceptacle h hinged cover 2. indicates a block of insulating material stto bottom. of the casino 1'. @n this as mock of insulating "materialtionary jaw contacts 41- and pivoted knife blade contacts r mounted; Theknife blade contacts 5 connected means of e crossnead 6 of hintingmaterial. The cross-headt is be provided with an eye retaining member awhich of the crank or operating handle 8, the op posits end beingprovided with a knob T 8 is provided with an intermed1- ortion 10 havinga bear I no l, the bearing having Specification of Letters Eatent.

operable connection with one end.

Patented Feb, a, raid:

Serial No. 802,878.

such relation to the pivotal points of the knife blade contacts 5 as toprovide for a full effective throw of the knife blade -con tacts whenthe operating handle is manipulated to make or break the connectionbetween them. A

In order to accelerate the breaking of the connection when the operatingcrank is manipulated, so that a quick or snappy break will occur, Iemploy a spiral spring 11 one end of which is connected to the operatingcrank by an eye 12 the other end being con nested by an eye 13 to oneend of the casing. This spring, as will be observed, is expanded whenthe movable contacts are thrown into their on position, the stored upenergy of the expanded spring spending itseil to accelerate the returnmovement of the movable contacts to their on position when the crank isoperated in the reverse direc tion to break the connection between thecontacts. in order to hold the knife blade contacts in their on positionand to overcome the power of the spring 11 the tendency of which is tonormally establish. open electricalconnection between the contacts, 3mount upon the side of the casing at it a steel sheet metal spring bentat 16 in the manner shown. "lhis S'OZlZW member is positioned that itwill he in the path of a portion of the operating crank and be engagedthereby who: the latter is rnanipu. lated to throw the knife blade e ntcts into their fan position. The a this, spring member will engage ingcrank and be deflected thei by forcing it outwardly and permitting thecrank pass or fall the carved b por tion thereof where it is retained bythe spring tension thereof. "iVlien ing crank is manipulated to triealconnection between the or holding ability or member is overcome thus 1passage ward oscillation. The full tensi spring ill to Qu 1 or thismovement so that a the switch. contacts is spring 11 and spring l toprevent a p tial connection lished between tir contacts one. nse a fulloositive connec "on being established between them. Fu thermore,spring'll pre the ace d .1218 spires. 15 both tend sing estabcome itstension sin ing the manipulation of the switch.

Havmg thus descrlhea. my inventlon what I claim as new herein and desireto secure by Letters Patent is:

1;. in an iron clad; switch of the character descriheai in combinationwith stationary and movable contacts, a snhstantialiy U,- shapedoperating member cooperatively associated with the movable. contacts ansextending through the side of the casing, an expansion spring connectedat one end. to one side of the casing and its other end to the U-shapecloperating member, said expension spring having a, tendency normally toaccelerate the movement of the U-shaped operating member when it ismanipulates to break the electrical connection between the contacts andmeans for overcoming the 2c tension of sent" expansion spring, saidmeans adapted to'engage theU-shapeci operating member when manipulatedto throw the contacts into contact making position.

2. in an iron clwi switch oi the character i ist eee the operatingmember and hole} the sameagainst the tension of saiti expansion springwhen the movable contacts are thrown circnit-estahlishecl. position,

in witness whereof I have hereunto set my hancil in the presence of twosubscribing witnesses this 21st day of Novena?)er 1913. I s'tson o. none Witnesses:

